Traction-wheel.



' 'PATENTED MAY-'26, 1903.- H. H. ROHLF. TRACTION WHEEL. APPLICATION rILED SEPTA), 1907- wuamioi Witnesses barren sirarss rn'ra'nr orrron.

HENRY H. ROfl-LF, OF NEW LONDON, WISCONSIN, ASSIGNOR OF ONE-THIRD TO ADOLPH L.

HAASE, OF NEW LONDON, WISCONSIN.

TRACTION-WHEEL.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed September 9, 1907. Serial No. 391,986.

' To all whom it may concern:

a and to insure positive force expended for dr1v' Be it known that}, HENRY H. RoHLr, citizen of the United States, residing at New London, in the county of Waupaca and State of Wisconsin, have invented certain new and useful Improvements in Traction-Wheels, of

which the following is a specification.

Drive wheels, of implements and machines,

propelled by power derived from a motor tire to the rim, thereby preventing displace ment thereof.

- The invention is shown in the accompanying drawing described hereinafter and particularly defined in the appended claims.

Figure 1 is a side view of a traction wheel embodying the invention. Fig. 2 is a transverse section of the wheel on the line y-y of' Fi 1. Fi 3 is an enlar edsectional view of a portion of the rim of the wheel, showing more clearly the construction and relative arrangement of'the cogs or lugs. Fig. 4 is a de tail perspective view of a cog or lug. Fig. 5 is a transverse section of a modified form of tire. s

Corresponding and like parts are referred to in. the following description and indicated in all the views of the drawings by the same reference characters.

The wheel comprises a hub 1, spokes 2 and a rim, the latter consistingof a felly 3 and a tire 4. These parts may be of any construction depending upon the design and special purpose for which the wheel is constructed. The felly 3, as also the spokes 2, is preferably of wood, whereas the tire 4 is of metal. The spokes 2 are .tenoned into the felly. The cogs or lugs forming the plied to the rim at points etween the spokes and consist of pointed ends 5, a threaded body 6 and a stem 7, the latter being threaded at 8 to receive a set nut 9. A shoulder 10 is formed at the base of the pointed end 5 and is adapted to engage with the tread surface of the tire i and sustain the stress and 1 lengt rejections are ap-' load when the cog or lug is in position to receive the same.

The pointed'end 5'm'ay be of any formation and outline and by havingrthe sides outwardly converged, the cog or lug is better enabled to penetrate a hard surface and thereby prevent slip ing. The body portion 6 is externally t eaded and ofa less than the thickness of the tire 4, there y enabling the shoulder 10 or base of the outer. end or projecting portion of the cog or lug to make contact With-the tread surface of the tire and sustain the perpendicular stress and load. The stem 7 is ada )ted to'pass through the opening formed in t e felly 3 and to extend beyond the inner side thereof so as to receive the set nut 9 by means'of which the folly is clamped to the' tire. A series of threaded openings 11 are provided in the tire 4 to receive the threaded bodies or portions 6 of. the cogs or lugs, thereby positively retaining the same in place. The set nuts 9 provide additional 'means for securing the cogs or lugs and at the sametime serve to clamp the felly to the tire. By arranging the-cogs or lugs between the spokes, they are more readily extracted] and interference cogs between the spokes and is obviated, thereby enabling a broken ,or disabled cog or spoke to be readily replaced.

In the modification shown in Fig. 5, the tire is of T form in cross section, one flange or wing being in the plane of the wheel and the other wing or flange being at a right angle to theplane of the wheel. The openings 11 constitute sockets which are formed at intervals in the circumferential length of the outer wing or flange of the tire. This form of tire is preferred, as it admits of the wheels more readily cutting down to solid surface, and it is necessary to provide tractive force when traveling on snow and icy surfaces. This construction also practically doubles the length. of the traction lugs or cogs by reason of the length of the sockets, the latter having portions projecting from opposite sides of the wing or flange of the tire in the plane of the wheel. This form of tire is also advantageousjmtraveling over.

projecting ends of the cogs or lugs preventing their becoming caught in openings or CIBVICGS. 7

- Having thus described the invention, What is claimed as new is:

In a traction Wheel, the combination of a rim'eomprising a felly and a tire, the same having registering openings, the 0 enings in the tire being internally threade and the openings in the felly being contracted, cogs, each consisting of a tapered end, a threaded body portion and a stem having its outer .end threaded a. shoulder being provided at the base or juncture of the body ortion and pointed'end, said cogs serving W en in position to connect the tire and rim and having their shouldered portions engaged with the tread surface of the tire, their threaded body portions screwed into the threaded opening of the tire and their stems passed through the contracted openings of the felly, and set nuts fitted upon the threaded ends of the stems.

In testimony whereof I afiix my signature in presence of two Witnesses.

HENRY H. ROHLF. [L. 3.

Witnesses:

J. KROMSCHINSKI, H. S." Rrrcnrn. 

